(1) Tested Westinghouse 6X4 Tube with Box Code 3R52 Full Wave Rectifier Tube

(1) Tested RCA 6CL3 Tube with Box Date Code C3 Half Wave Rectifier Tube

Sylvania NOS - 6DL3 For SEARS With Original Box - Half Wave Rectifier Tube

(1) Tested GE 6AX3 Compactron Tube with Box Date Code JF Half Wave Rectifier

(1) Tested Westinghouse 12HG7/12GN7A Tube with Box Date Code 33-04 12HG7 12GN7A

(1) Tested Sylvania 6CL3 Tube with Box Date Code NR Half Wave Rectifier Tube

(1) Tested Westinghouse 3DT6 Tube with Box Date Code 63-43 Sharp Cutoff Pentode

(1) Tested Sylvania 6AY3 Tube with Box Date Code mk RAF Half Wave Rectifier